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Finding the Fourth Proportional to 335.85, 503.79 and 130.40

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Solution

The fourth proportional to 335.85, 503.79 and 130.40 is: 195.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.85 : 503.79 = 130.40 : x
  2. Step 2: Convert to fraction form
    335.85/503.79 = 130.40/x
  3. Step 3: Cross multiply
    335.85x = 503.79 × 130.40
  4. Step 4: Simplify right side
    335.85x = 65,694.22
  5. Step 5: Solve for x
    x = 65,694.22/335.85
  6. Step 6: Final answer
    x = 195.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.